Yes, I've considered that angle. But I think the best approach is a simple one: NONE of the language in the final product, not even a sentence or a half-sentence, should be AI-generated. AI sources should be treated the same way as any other written source: If you quote it without attribution, it's plagiarism.
Under these hypothetical rules, a writer could still use AI for preliminary research, in the same way that they might use wikipedia (and with the same caveats).
The idea of "just using a little AI help" for the actual writing is too much of a slippery slope. (I've talked to professional writers who have used that phrase, so I know). How much is "a little help"? If it's only a little bit of help, you haven't saved much time. If it's more than a little, we're back to square one.
There are plenty of talented writers out there who need jobs, and are willing to do the work, and won't complain if you forbid them from using AI "helpers".